Ah but, I recall, from the 1980's - Peter Norton's Utilities (made him a wealthy man) and a competitor PCTools delux from Central Point Software Inc. These MS-DOS file managers and utility softwaresmade MS Dos a nicer place to be - for some of us.
Bloated and transformed nowadays - owned by Symantec.
To be fair norton worked ok for me but I kept having trouble with the three computer package, one would suddenly tell me it had expired and I would spend an hour on line with norton to fix it! It was very power hungry in the past but did improve.
I once found a computer where there were two AVs fighting over a single file. Somehow they got stuck in a loop copying the same 5kb file from each quarantine folder to their own.
I think one of them was Norton.
I've also seen a bad install of Symantec take out a large companies intranet at 11am every week for two months before someone looked in the right place. That was admin error though, not Symantec's fault really.